The Girl Who Cried Monster is the 8th book in the original Goosebumps series.
The cover illustration shows Lucy Dark watching Mr. Mortman gripping a bowl of turtles, about to devour a fly.
Plot[]
Lucy likes to tell monster stories. She's told so many that her friends and family are sick of it. Then one day, Lucy discovers a real, live monster: the librarian in charge of the summer reading program. Too bad Lucy's told so many monster tall tales. Too bad no one believes a word she says. Too bad the monster knows who she is... ...and is coming after her next.